Raising error for using snapshot with older VTK versions
Raising error for using snapshot with older VTK versions

StongeEtienne/dipy,villalonreina/dipy,JohnGriffiths/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,JohnGriffiths/dipy,StongeEtienne/dipy,matthieudumont/dipy,matthieudumont/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy